81808034 has 64 divisors (see below), whose sum is σ = 163676160. Its totient is φ = 29704320.

The previous prime is 81808031. The next prime is 81808049. The reversal of 81808034 is 43080818.

It is not an unprimeable number, because it can be changed into a prime (81808031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213407 + ... + 213789.

It is an arithmetic number, because the mean of its divisors is an integer number (2557440).

Almost surely, 2^81808034 is an apocalyptic number.

81808034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

81808034 is a wasteful number, since it uses less digits than its factorization.

81808034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 81808034 is about 9044.7793781828. The cubic root of 81808034 is about 434.1088622409.

The spelling of 81808034 in words is "eighty-one million, eight hundred eight thousand, thirty-four".